The Cologne-based company Coptr now presents a newly developed solution for this with "Tube one" - a fully automatic thunderstorm warning system for interrupting and resuming bathing operations.
The thunderstorm warning system receives data of actually measured lightning in the vicinity of the outdoor pool in real time, accurate to within a few metres.
When lightning is measured, a signal is automatically sent to interrupt bathing.
After the thunderstorm has passed, the pool is automatically re-opened. Each flash of lightning is documented to the second and distance for proof of the events.